Seiko Cal. 6638 - 238

The Seiko 6638-238 represents an important milestone in Seiko's 1982 lineup. The Inner Rotating bezel and 34mm case give it a distinctive presence on the wrist. [seikata-wm-1ee79ba14345]

Also known as: Golden Tuna

Specifications

Movement

Spring Drive

Case Material

Hardlex-Coated Steel

Case Width

34mm

Case Thickness

8.1mm

Lug Width

22mm

Crystal

Acrylic

Bezel

Inner Rotating

Water Resistance

190m

Dial Color

Blue Sunburst

Jewels

27j

Frequency

28,800 bph

Power Reserve

64 hours

Year

1982

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